2. Explain night vision with science(1/2)
In the following time, Gao Ang did not broadcast live again.
It was almost midnight. After turning off the computer, he was ready to go to bed, hoping that after waking up, some of them would return to their original appearance.
As a normal human, Gao Yang enjoys the temptation of food very much.
The stimulation of the taste buds, the pleasure of chewing, and the satisfaction of filling the stomach, are a habit he has formed for more than 20 years.
Although he can still enjoy this now, he is afraid that sooner or later, he will become a monster who does not eat or drink.
If he doesn't eat or drink, it means he will lose another kind of happiness: the pleasure of squatting.
Sitting on the toilet, lit a cigarette, sliding the screen of the phone, watching the news and jokes, and making waves of pigs from time to time...
Isn't this another kind of life?
Lying on the bed, Gao Ang suddenly discovered another problem: he didn't turn on the air conditioner, and it was not hot at all!
With a "swish", he stood up straight from the bed.
I touched my body, it was neither lukewarm nor hot, and there was no cold feeling!
In summer, the human body will naturally make a series of adjustments or adapt to the environment.
Most people's body surface temperature will feel a little cold when touched.
It may not be appropriate to use the word "cold".
When you change the angle, the skin on the body will feel the warmth from the palms.
However, both of these high feelings cannot be felt.
If it weren't for the friction between the palms and the skin, he wouldn't even feel the foreign object on his thighs.
At this time, Gao Ang was a little panicked: Could it be that he had 'polio'?
I quickly stretched my arms and kicked my legs, twisted my neck and crooked my eyes, and opened my mouth to the maximum...
"Huh, it's okay, I can still move."
After feeling that his body can still perform normal functions, Gao Qiang breathed a little relieved.
He touched his not strong chest muscles again, but he still couldn't feel the "cold". What's even more terrifying is that his heartbeat is not so active.
He rushed to the desk and took out the thermometer from the drawer. He wanted to test his body temperature.
After swaying a few times, he reset the thermometer to zero and clamped it firmly under his armpits. Gao Ang then slowly let out a breath.
Wait for a few minutes and after about the same time, you can check the temperature of your body surface.
The normal body temperature of adults' armpits is generally between 36 and 37 degrees. As long as it is within this range, the human body is at least in the body temperature, and it is considered healthy.
Just as Gao Qiang was thinking a lot, he suddenly realized a problem: he didn't seem to turn on the light!
If the lights are not turned on, it means that the house is dark and lit.
Even in a prosperous city like the Magic City, even in a mid-to-high-end apartment complex like Vanke Apartment, the house should be pitch black!
In theory, he shouldn't get out of bed so smoothly, wear slippers, open drawers, and get a thermometer...
"Is this...can't be able to see night vision?"
Gao Ang's eyes widened, his face full of disbelief.
That's right, he was sure that the lights were not turned on!
The scene he saw was no different from what he saw when he turned on the light.
If anything, it is: the light above the head is not lit...that's all!
He stretched out his hand tremblingly, and Gao An wanted to press the switch at the head of the bed.
The moment I touched the switch, I retracted my hand back like an electric shock.
He grabbed the thermometer under his armpits and kicked the slippers, and walked into the bathroom.
He wanted to confirm whether he was in the mirror, his eyes glowing, emitting a charming light, like a pair of titanium alloy dog eyes!
He lowered his head, stepped over the threshold of the bathroom, slowly raised his head, and faced his handsome and handsome face directly to the mirror.
He did not open his eyes immediately, fearing that the scene he saw was not the beautiful picture he imagined.
"call!"
After breathing a deep breath, Gao Ang slowly opened his titanium alloy dog eyes.
"It's okay, it's okay, it's normal!"
I am still so handsome in the mirror!
The light does not know how to come, but he can clearly see the mirror image of every part in the mirror.
It was not as bright as incandescent lights, nor as blurred as in the night, but he could clearly see the beard on the corner of his mouth and the several youthful pimples on his face that had grown from staying up late.
All of this, Gao Yang felt incredible.
The scientific education I received since childhood told him that if you want to image the retina, you must have light.
The light reflected from an object is regulated by the retina and will pass through a lens filled with transparent gelatinous substances. Only after focusing is done here will it be imaged on the retina that is very sensitive to light.
After imaging, these lights are accepted and converted into signals, which will be transmitted to the brain through the optic nerve, that is, the visual nerve area in the brain. Therefore, humans or other animals will "see" things.
Why didn’t I see anything when I turned off the lights before, but now it’s OK?
This question hovers in Gao Qiang's head and cannot be removed.
The lights in the bathroom were not turned on, and the lights in the bedroom were not turned on.
He was on the seventh floor. Although he was facing south, there was no moonlight tonight, and the street lights could not shine in...
Therefore, a normal human, or a pair of normal human eyes, should not see the content.
Then there is only one answer: something went wrong with his eyes.
Or, his eyes mutated!
The reason why humans cannot see content in dark environments is not that there is no light reflected to the retina.
Instead, a lot of light is directly filtered out at the iris level.
Here we will explain a definition: visible light frequency.
The electromagnetic waves emitted by cosmic celestial bodies include a wide range from radio waves to gamma ray frequencies. However, the earth's atmosphere only leaves two "skylight windows", one is an optical window (or visible light window) with a wavelength of 0.78~0.4μm, and the other is a radio window with a wavelength of about 10m~1mm.
In addition to emitting visible light, the electromagnetic radiation from other bands is basically absorbed by the Earth's atmosphere. The "absorption" mentioned here does not mean that all electromagnetic radiation from other bands are absorbed, but there will still be some missing bands of electromagnetic radiation that are free from the Earth's atmosphere.
However, they cannot "participate in" lighting, so in the long process of evolution, there is no need for the human eye to "set up" photosensitive cells for them. This shows why the so-called "visible light" that the human eye can feel is in such a band (780nm~400nm), rather than other bands.
Of course, all of the above are the result of the long-term evolution of human eyes.
Now, for some reason, the high-profile eyes have mutated. The iris in the eyes can absorb the "electromagnetic radiation from other bands", so he can also see things at night.
All of this is just Gao Yang's own analysis. Whether it is true or false is still needed to further verify it.
It was almost time, so I took out the thermometer under my armpit and took a look: 36.5°.
Very normal body temperature, neither high nor low.
After a breath of relief, Gao Ang wiped the sweat beads that did not exist on his forehead, and felt a little relieved.
"If the body temperature is fine, at least it means that the internal circulation is still healthy."
As long as the internal circulation is in a healthy operation, he no longer worrys that he will "burp" at any time.
As a young man in the new era who has old age and no small ones, he cares a lot about his life.
What does a person live for the sake of?
He has thought about this issue himself and debated it with himself.
In the final analysis, he can only come to this conclusion: people live for the sake of living.
Therefore, all premises must be to be alive.
Only by living can we realize our value, do what we want to do, and contribute to socialism...
After struggling for a night, Gao Ang was not sleepy, but just felt a little uncomfortable.
These so-called discomforts can actually be ignored, and are completely compared with the feeling during the day to get the result.
“In other words, I prefer a little bit during the day?”
When he muttered this sentence, Gao Ang felt that he could give himself a broken mind.
Isn't this nonsense? Of course humans like the daytime.
He is not an owl or a vampire, how could he like the night...
Turn on the bathroom lights and Gao Ang wanted to confirm whether there were any changes in appearance in his eyes.
If the pupil color turns red, green or blue as mentioned in movies or novels, he has to find a way to cover it up, such as wearing sunglasses?
"Fortunately, I'm still a black-eyed Dongguo."
After carefully checking in the mirror for a long time, Gao Ang finally took a breath again.
To be continued...